Photoluminescence of the Eu3+-Activated YxLu1−xNbO4 (x = 0, 0.25, 0.5, 0.75, 1) Solid-Solution Phosphors

Sekulić, Milica; Dramićanin, Tatjana; Ćirić, Aleksandar; Đačanin Far, Ljubica; Dramićanin, Miroslav D.; Đorđević, Vesna

doi:10.3390/cryst12030427

Open AccessArticle

Photoluminescence of the Eu³⁺-Activated Y_xLu_1−xNbO₄ (x = 0, 0.25, 0.5, 0.75, 1) Solid-Solution Phosphors

by

Milica Sekulić

,

Tatjana Dramićanin

,

Aleksandar Ćirić

,

Ljubica Đačanin Far

,

Miroslav D. Dramićanin

and

Vesna Đorđević

^*

Center of Excellence for Photoconversion, Vinča Institute of Nuclear Sciences—National Institute of the Republic of Serbia, University of Belgrade, P.O. Box 522 Belgrade, Serbia

^*

Author to whom correspondence should be addressed.

Crystals 2022, 12(3), 427; https://doi.org/10.3390/cryst12030427

Submission received: 18 February 2022 / Revised: 11 March 2022 / Accepted: 15 March 2022 / Published: 19 March 2022

(This article belongs to the Special Issue Optical and Spectroscopic Properties of Rare-Earth-Doped Crystals)

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Abstract

Eu³⁺-doped Y_xLu_1−xNbO₄ (x = 0, 0.25, 0.5, 0.75, 1) were prepared by the solid-state reaction method. YNbO₄:Eu³⁺ and LuNbO₄:Eu³⁺ crystallize as beta-Fergusonite (SG no. 15) in 1–10 μm diameter particles. Photoluminescence emission spectra show a slight linear variation of emission energies and intensities with the solid-solution composition in terms of Y/Lu content. The energy difference between Stark sublevels of ⁵D₀→⁷F₁ emission increases, while the asymmetry ratio decreases with the composition. From the dispersion relations of pure YNbO₄ and LuNbO₄, the refractive index values for each concentration and emission wavelength are estimated. The Ω₂ Judd–Ofelt parameter shows a linear increase from 6.75 to 7.48 × 10⁻²⁰ cm² from x = 0 to 1, respectively, and Ω₄ from 2.69 to 2.95 × 10⁻²⁰ cm². The lowest non-radiative deexcitation rate was observed with x = 1, and thus LuNbO₄:Eu³⁺ is more efficient phosphor than YNbO₄:Eu³⁺.

Keywords: phosphor; Eu³⁺; niobates; Judd-Ofelt; quantum efficiency; refractive index

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MDPI and ACS Style

Sekulić, M.; Dramićanin, T.; Ćirić, A.; Đačanin Far, L.; Dramićanin, M.D.; Đorđević, V. Photoluminescence of the Eu³⁺-Activated Y_xLu_1−xNbO₄ (x = 0, 0.25, 0.5, 0.75, 1) Solid-Solution Phosphors. Crystals 2022, 12, 427. https://doi.org/10.3390/cryst12030427

AMA Style

Sekulić M, Dramićanin T, Ćirić A, Đačanin Far L, Dramićanin MD, Đorđević V. Photoluminescence of the Eu³⁺-Activated Y_xLu_1−xNbO₄ (x = 0, 0.25, 0.5, 0.75, 1) Solid-Solution Phosphors. Crystals. 2022; 12(3):427. https://doi.org/10.3390/cryst12030427

Chicago/Turabian Style

Sekulić, Milica, Tatjana Dramićanin, Aleksandar Ćirić, Ljubica Đačanin Far, Miroslav D. Dramićanin, and Vesna Đorđević. 2022. "Photoluminescence of the Eu³⁺-Activated Y_xLu_1−xNbO₄ (x = 0, 0.25, 0.5, 0.75, 1) Solid-Solution Phosphors" Crystals 12, no. 3: 427. https://doi.org/10.3390/cryst12030427

APA Style

Sekulić, M., Dramićanin, T., Ćirić, A., Đačanin Far, L., Dramićanin, M. D., & Đorđević, V. (2022). Photoluminescence of the Eu³⁺-Activated Y_xLu_1−xNbO₄ (x = 0, 0.25, 0.5, 0.75, 1) Solid-Solution Phosphors. Crystals, 12(3), 427. https://doi.org/10.3390/cryst12030427

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Photoluminescence of the Eu³⁺-Activated Y_xLu_1−xNbO₄ (x = 0, 0.25, 0.5, 0.75, 1) Solid-Solution Phosphors

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